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TPS62163: Dead time and Lowside-FET Vf voltage

Part Number: TPS62163


Could you let me know Dead time for switching and Low side-FET Vf voltage of TPS62163, please?

My customer has a question about below picture.
This is SW pin waveform.
Customer wants to know if it is problem that voltage drop of SW pin to under -0.3V.
-0.3V means the min value of absolute maximum voltage.

I think this waveform is no problem.
This drop is showed Vf voltage of body diode in low side-FET during dead time.
But this voltage level is small for Vf. I think Vf is 0.5V~0.7V.

For the reason, i request the above question.

Best regards,